变换域通信信号侦察中的参数估计方法  

Parameter Estimation Method for Transform Domain Communication Signals

作　　者：石荣 杜宇 胡苏[2] 

机构地区：[1]电子信息控制重点实验室,四川成都610036 [2]电子科技大学通信抗干扰国家重点实验室,四川成都611731

出　　处：《无线电通信技术》2018年第2期174-179,共6页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：对截获的变换域通信信号进行参数估计是后续对其实施非合作解调与信息分析的前提。针对这一需求,在对变换域通信信号模型概要介绍之后,确定了描述该信号的特征参数集,并逐一分析了各种基本特征参数的提取方法与处理步骤。在此基础上利用变换域通信信号采用圆周移位键控调制的特点,通过相邻符号差分处理的方式巧妙地消除了侦察传输信道所带来的影响,实现了调制符号时域分段个数的参数估计,并为信号解调与发送序列推断奠定了基础。仿真试验验证了主要方法的有效性与实用性,从而为战场新体制通信目标信号的侦察处理提供了重要参考。Parameter estimation of transform domain communication signal is the precondition of its non-cooperated demodulation and information analysis.After a brief introduction to the transform domain communication signal model,its characteristic parameter set is described.The method and steps of parameter estimation are explained for basic parameters.Then the characteristics of cyclic code shift keying are utilized,and the segment number of a symbol on time domain is estimated through the differential processing between two adjacent symbols.In this way,the effect of reconnaissance transmission channels can be eliminated.It is the basis of demodulation and transmitted sequence acquisition.The validity and applicability of the above main methods are demonstrated by simulations.It provides an important reference for the reconnaissance and processing of new communication signals in the battlefield.

关 键 词：变换域通信系统 通信侦察 参数估计 圆周移位键控 传输信道 差分处理 信息比特率 差分解调 

分 类 号：TN971[电子电信—信号与信息处理]